BSC 1005 UPDATED EXAMS SCRIPT QUESTIONS AND
ANSWERS SURE A+
✔✔Archaea are composed of ________ cells. - ✔✔prokaryotic
✔✔________ cells lack a membrane-enclosed nucleus. - ✔✔Prokaryotic
✔✔Unlike animal cells, plant cells have ________ and ________. Unlike plant cells,
animal cells have ________. - ✔✔chloroplasts . . . cell walls . . . centrioles
✔✔Plasma membranes are permeable to - ✔✔nonpolar molecules such as CO2.
✔✔The nucleus of a cell - ✔✔contains DNA.
✔✔Long fibers of DNA and protein are called - ✔✔chromatin.
✔✔The endomembrane system includes all of the following organelles except the -
✔✔peroxisome.
✔✔The two main functions of the rough endoplasmic reticulum are the production of -
✔✔membrane and proteins secreted by the cell.
, ✔✔The Golgi apparatus - ✔✔stores, modifies, and packages proteins.
✔✔The function of mitochondria is - ✔✔cellular respiration.
✔✔The function of chloroplasts is - ✔✔photosynthesis.
✔✔Singer and Nicolson's fluid mosaic model of the membrane proposed that
membranes_____. - ✔✔consist of protein molecules embedded in a fluid bilayer of
phospholipids
✔✔D. - ✔✔Which component is a peripheral protein?
✔✔E. - ✔✔Which component is cholesterol?
✔✔A. - ✔✔Which component is a protein fiber of the extracellular matrix?
✔✔C. - ✔✔Which component is a microfilament (actin filament) of the cytoskeleton?
✔✔B. - ✔✔Which component is a glycolipid?
✔✔Which of the following most accurately describes selective permeability? - ✔✔Only
certain molecules can cross a cell membrane.
✔✔Which of the following would likely move through the lipid bilayer of a plasma
membrane most rapidly? - ✔✔CO2
✔✔Which of the following allows water to move much faster across cell membranes? -
✔✔aquaporins
✔✔Diffusion _____. - ✔✔is a passive process in which molecules move from a region of
higher concentration to a region of
lower concentration
✔✔Which of the following is true of osmosis? - ✔✔In osmosis, water moves across a
membrane from areas of lower solute concentration to areas of
higher solute concentration.
✔✔The sodium-potassium pump is called an electrogenic pump because it _____. -
✔✔contributes to the membrane potential
✔✔The force driving simple diffusion is _____, while the energy source for active
transport is _____. - ✔✔the concentration gradient; ATP
ANSWERS SURE A+
✔✔Archaea are composed of ________ cells. - ✔✔prokaryotic
✔✔________ cells lack a membrane-enclosed nucleus. - ✔✔Prokaryotic
✔✔Unlike animal cells, plant cells have ________ and ________. Unlike plant cells,
animal cells have ________. - ✔✔chloroplasts . . . cell walls . . . centrioles
✔✔Plasma membranes are permeable to - ✔✔nonpolar molecules such as CO2.
✔✔The nucleus of a cell - ✔✔contains DNA.
✔✔Long fibers of DNA and protein are called - ✔✔chromatin.
✔✔The endomembrane system includes all of the following organelles except the -
✔✔peroxisome.
✔✔The two main functions of the rough endoplasmic reticulum are the production of -
✔✔membrane and proteins secreted by the cell.
, ✔✔The Golgi apparatus - ✔✔stores, modifies, and packages proteins.
✔✔The function of mitochondria is - ✔✔cellular respiration.
✔✔The function of chloroplasts is - ✔✔photosynthesis.
✔✔Singer and Nicolson's fluid mosaic model of the membrane proposed that
membranes_____. - ✔✔consist of protein molecules embedded in a fluid bilayer of
phospholipids
✔✔D. - ✔✔Which component is a peripheral protein?
✔✔E. - ✔✔Which component is cholesterol?
✔✔A. - ✔✔Which component is a protein fiber of the extracellular matrix?
✔✔C. - ✔✔Which component is a microfilament (actin filament) of the cytoskeleton?
✔✔B. - ✔✔Which component is a glycolipid?
✔✔Which of the following most accurately describes selective permeability? - ✔✔Only
certain molecules can cross a cell membrane.
✔✔Which of the following would likely move through the lipid bilayer of a plasma
membrane most rapidly? - ✔✔CO2
✔✔Which of the following allows water to move much faster across cell membranes? -
✔✔aquaporins
✔✔Diffusion _____. - ✔✔is a passive process in which molecules move from a region of
higher concentration to a region of
lower concentration
✔✔Which of the following is true of osmosis? - ✔✔In osmosis, water moves across a
membrane from areas of lower solute concentration to areas of
higher solute concentration.
✔✔The sodium-potassium pump is called an electrogenic pump because it _____. -
✔✔contributes to the membrane potential
✔✔The force driving simple diffusion is _____, while the energy source for active
transport is _____. - ✔✔the concentration gradient; ATP
